S&P 500 (SPX) Up or Down on August 7?

Platform comparison

Market context

The S&P 500 has just had a modest setback into the August 7 payrolls print, which is why the crowd’s 96% “Up” price is still close to a foregone conclusion even though the market finished lower on the prior session. Official historical data show the index closed at 7,503.85 on 7 August and 7,482.71 on the following session in the supplied market snapshots, with the broader tape described as a second consecutive decline rather than a trend break.[8][2][1] That kind of drift matters for cross-platform comparison: prediction markets are effectively pricing a one-day close-to-close rise, while sportsbook-style event lines on the same contract tend to lag when the underlying move is small and the benchmark is already near record territory. By contrast, analyst-style commentary has framed the index as still constructive but vulnerable to consolidation after a strong run, which makes a 96% probability look rich rather than absurd.

The main near-term catalyst is the July employment report, due before the open on Friday, alongside the unemployment rate, average hourly earnings, average workweek and manufacturing payrolls.[11][14] Those releases can move index futures, Treasury yields and rate-cut expectations before the cash close, which is especially relevant because this market resolves on the official S&P 500 close, not intraday highs or futures pricing. Recent market commentary also pointed to the index testing the 7,620 area as a technical reference point after a stretch of record closes, suggesting that traders were watching whether strength would broaden or whether the market would continue to consolidate.[16][10] In that setting, the biggest risk to the “Up” side is a soft labour report that triggers a broad de-risking, while a stronger-than-expected print would more likely support a higher close and keep the crowd-implied probability broadly aligned with consensus.[6][14][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

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Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.